Malicious PDF — malware analysis report

Static analysis result for SHA-256 b72000f4ba181a00…

MALICIOUS

PDF

87.6 KB Created: 2021-07-26 14:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e326ea6b413ba738ec04680f9775baf1 SHA-1: d9887962a64d3ec51daad2b72513d7c4dd9d887d SHA-256: b72000f4ba181a006f8c4b711a23c7d1ebc215b25f075d35e0d6b8f9a57ae04e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs suggest an attempt to redirect users to malicious content or phishing pages, likely as part of a broader attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://acril.ru/ufiles/files/83571267803.pdf In PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/0d97n9269v6ccu3c779kd70lts/50640477007.pdfIn PDF document text
    • http://chapelguild.com/images/usr/torigodedik.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/aa769d1c0b457b3655ed7a93e56e5baa/84580231479.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/0e7bdeb77e2f18a01713d885cdaa7459/88349833195.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/jozow.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/76dmccoojkrs2jap102ojqgiis/pipovos.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160867e1850015---rorevimubawiw.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/devuwovigonovefimorojife.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8468e30502---kateje.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/54393897698.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5b63a68e---fobaxanilaxamutagenawan.pdfIn PDF document text
    • http://1975geegees.com/clients/78603/File/bopigonizor.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1c28ed1e9---koloxil.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/99618193930.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b04bd9939e6---53595569308.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/jukof.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/66740129933.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/pewidewe.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d8d5e206---lezejidumakek.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/79681642004.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/21298037867.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/fupimivegadomivekuvuwuwe.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/13551452524.pdfIn PDF document text
    • http://banning64reunion.com/clients/a/a7/a71e9339640f4be667ed55590a288245/File/93167299789.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=watch+wizards+of+waverly+place+alex+vs+alex+full+movie+online+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 11408 bytes
SHA-256: 2d6d7daa3edbabc8d460948b5cb5fd8788a98d0f78b813488da88b388c0cae03
font_01_sfnt_off000109c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C3 16932 bytes
SHA-256: 594509d8c18ba996c125fe1a36d6b331b690a8252900ebd09547cbcf4374dbae
font_02_sfnt_off000135f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1